Pith Number

pith:OJXGHTN2

pith:2012:OJXGHTN2VCKHOVS3625XS5BDF4

not attested not anchored not stored refs pending

Thirty years of SN 1980K: Evidence for light echoes

Barbara Ercolano, Ben E. K. Sugerman, Geoffrey C. Clayton, Jennifer E. Andrews, Margaret Meixner, Masaaki Otsuka, Michael J. Barlow, Oliver Krause, Parviz Ghavamian, Robert C. Kennicutt Jr.

arxiv:1202.3075 v2 · 2012-02-14 · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OJXGHTN2VCKHOVS3625XS5BDF4}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:58:28.593893Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

726e63cdbaa89477565bf6bb7974232f3bf51a0ebd6ad4c667213233bd159c9c

Aliases

arxiv: 1202.3075 · arxiv_version: 1202.3075v2 · doi: 10.48550/arxiv.1202.3075 · pith_short_12: OJXGHTN2VCKH · pith_short_16: OJXGHTN2VCKHOVS3 · pith_short_8: OJXGHTN2

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/OJXGHTN2VCKHOVS3625XS5BDF4 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 726e63cdbaa89477565bf6bb7974232f3bf51a0ebd6ad4c667213233bd159c9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b57e5cf10eed6dcb8fbe6b0347bba3d9eb2f1104883c5444244148678bc1a93",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-02-14T15:58:41Z",
    "title_canon_sha256": "28f76337070eb3ff7fc32d79106bd3436179adb28091b09345c4b258f0dc2597"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.3075",
    "kind": "arxiv",
    "version": 2
  }
}